code: def init_class_fixtures(cls):
      super(TestAPIShim, cls).init_class_fixtures()
  
      cls.asset1 = cls.asset_finder.retrieve_asset(1)
      cls.asset2 = cls.asset_finder.retrieve_asset(2)
      cls.asset3 = cls.asset_finder.retrieve_asset(3)
  
imports: import warnings
  from mock import patch
  import numpy
  import pandas
  from pandas.core.common import PerformanceWarning
  from zipline.finance.trading import SimulationParameters
  from zipline.testing import MockDailyBarReader, create_daily_df_for_asset, create_minute_df_for_asset, str_to_seconds
  from zipline.testing.fixtures import WithCreateBarData, WithMakeAlgo, ZiplineTestCase
  from zipline.zipline_warnings import ZiplineDeprecationWarning
label_desc: Use image node_id 5 for calling the TestAPIShim obj's underlying member method code with example usage: obj.init_class_fixtures(cls) without return types